Such simple and great use of the theme! I like how you can hit an already hit enemy from underneath, extending you hyper movement and I like how the longer you hold jump, the higher you go.
The level design is well done, letting the player choose their difficulty based on the route .The 2nd level makes you think about timing and placement, keeping in mind that the hyper mode doens't allow you to change your direction.
On thing that might make it feel better is if you can jump if you drop from a platform. I would like to see better post-jam art and music if you decide to work on it more. Otherwise, really thoughtful gameplay!